{"id":"USN-4547-2","summary":"ssvnc vulnerabilities","details":"It was discovered that the LibVNCClient vendored in SSVNC incorrectly handled\ncertain packet lengths. A remote attacker could possibly use this issue to\nobtain sensitive information, cause a denial of service, or execute arbitrary\ncode. (CVE-2018-20020, CVE-2018-20021, CVE-2018-20022, CVE-2018-2024)\n","modified":"2026-02-10T04:41:56Z","published":"2020-09-28T19:52:43Z","related":["UBUNTU-CVE-2018-20020","UBUNTU-CVE-2018-20021","UBUNTU-CVE-2018-20022","UBUNTU-CVE-2018-20024"],"upstream":["CVE-2018-20020","CVE-2018-20021","CVE-2018-20022","CVE-2018-20024","UBUNTU-CVE-2018-20020","UBUNTU-CVE-2018-20021","UBUNTU-CVE-2018-20022","UBUNTU-CVE-2018-20024"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4547-2"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-20020"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-20021"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-20022"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-20024"}],"affected":[{"package":{"name":"ssvnc","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/ssvnc@1.0.29-2+deb8u1build0.16.04.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.29-2+deb8u1build0.16.04.1"}]}],"versions":["1.0.29-2build1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"ssvnc","binary_version":"1.0.29-2+deb8u1build0.16.04.1"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:16.04:LTS","cves":[{"id":"CVE-2018-20020","severity":[{"score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2018-20021","severity":[{"score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2018-20022","severity":[{"score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2018-20024","severity":[{"score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4547-2.json"}}],"schema_version":"1.7.3"}